Large-eddy simulation on gas mixing induced by the high-buoyancy flow in the CIGMA facility

Abe, Satoshi; Shibamoto, Yasuteru

Nuclear Engineering and Technology, 55(5), p.1742 - 1756, 2023/05

https://doi.org/10.1016/j.net.2023.01.019

Experimental investigation of natural convection and gas mixing behaviors driven by outer surface cooling with and without density stratification consisting of an air-helium gas mixture in a large-scale enclosed vessel

Abe, Satoshi; Hamdani, A.; Ishigaki, Masahiro*; Shibamoto, Yasuteru

Annals of Nuclear Energy, 166, p.108791_1 - 108791_18, 2022/02

https://doi.org/10.1016/j.anucene.2021.108791

Experiments on collapse of density stratification by outer surface cooling of containment vessel; CC-PL-12 and CC-PL-24 experiments at CIGMA

Ishigaki, Masahiro; Abe, Satoshi; Shibamoto, Yasuteru; Yonomoto, Taisuke

Proceedings of 12th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics, Operation and Safety (NUTHOS-12) (USB Flash Drive), 11 Pages, 2018/10

no abstracts in English

Outcome of first containment cooling experiments using CIGMA

Shibamoto, Yasuteru; Yonomoto, Taisuke; Ishigaki, Masahiro; Abe, Satoshi

Proceedings of 11th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operation and Safety (NUTHOS-11) (USB Flash Drive), 10 Pages, 2016/10

First experiments at the CIGMA facility for investigations of LWR containment thermal hydraulics

Shibamoto, Yasuteru; Abe, Satoshi; Ishigaki, Masahiro; Yonomoto, Taisuke

Proceedings of 24th International Conference on Nuclear Engineering (ICONE-24) (DVD-ROM), 9 Pages, 2016/06

http://doi.org/10.1115/ICONE24-60515

The CIGMA facility experiment on containment vessel outer surface cooling, 2; Effect of initial gas composition, 2

Ishigaki, Masahiro; Abe, Satoshi; Shibamoto, Yasuteru; Yonomoto, Taisuke

no journal, , 

no abstracts in English

Numerical simulation of a buoyant heated air jet in large containment vessel CIGMA with outer surface cooling

Hamdani, A.; Abe, Satoshi; Ishigaki, Masahiro; Shibamoto, Yasuteru; Yonomoto, Taisuke

no journal, , 

CIGMA experiment on thermal hydraulic behavior in a containment vessel during a severe accident, 1; Experimental study on density stratification break-up by an outer cooling

Abe, Satoshi; Ishigaki, Masahiro; Shibamoto, Yasuteru; Yonomoto, Taisuke

no journal, , 

no abstracts in English

CFD analysis of thermal radiation effects on large containment CIGMA vessel with Weighted Sum of Gray Gases (WSGG) Model

Hamdani, A.; Soma, Shu; Abe, Satoshi; Shibamoto, Yasuteru

no journal, , 

During a postulated accident, the containment thermal-hydraulics phenomena will necessarily include radiation heat transfer since it has a significant role in the buoyancy-driven flow for large facilities. The radiation heat transfer might occur within the gas mixture and between the gas mixture and the surrounding structures due to the high absorption and emission of radiation from steam. A numerical computational fluid dynamic (CFD) simulation with a radiation model and different parameters on the component of three gases, i.e., helium, air, and steam, was performed in this study. The numerical simulation was carried out using open source CFD code OpenFOAM. A Weighted Sum of Gray Gases (WSGG) model was newly implemented in the OpenFOAM solver. At first, to achieve a significant temperature difference, the initial condition inside the vessel was dry, and steam content was set to 0.1 percent. The helium stratification was initiated with a molar fraction of 50 percent. The initial temperature and pressure were set to 20C and 1 atm. A transient simulation was started by injecting pure helium through a nozzle from the top vessel with a mass flow rate 5 g/s. Furthermore, the transient simulation was carried out using three different models. Results showed that the simulation without the radiation model showed a noticeable temperature difference compared with the radiation model. In addition, these preliminary results indicate that thermal radiation should be considered even though the steam content inside the containment vessel is low.

CIGMA experiment CC-PL-04 on thermal hydraulics behavior in containment vessel by outer surface cooling, 1; Experimental results and RELAP5 analysis

Shibamoto, Yasuteru; Ishigaki, Masahiro; Abe, Satoshi; Yonomoto, Taisuke

no journal, , 

no abstracts in English